Consistently high production volumes at Ford Dagenham over the past half-century have pushed output at the east London factory past the 40 million-engines milestone.
This means the site has produced enough engines to stretch 20,000 miles end-to-end.
The factory, which has engineered and manufactured engines since the early 1930s, now specialises in fuel-efficient diesel models.
These engines are suitable for the car maker's large, medium and small vehicle ranges and also feature in advertisements for Ford vehicles.
Dagenham supplies more than half of worldwide Ford diesel engines.
Engines built at the site have provided power for a clutch of famous Fords, including the Escort, Capri, Cortina, Transit and Granada models.it.
Ford Britain chairman Joe Greenwell said: "Dagenham producing 40 million engines is a significant milestone for Ford's biggest UK site.
"Ford Dagenham now produces Ford's most fuel-efficient engine in the 1.6-litre TDCi unit and exports to 12 countries around the world as part of our global 'One Ford' strategy.
"This site is helping to power the UK's sustainable economic recovery."
If you require further assistance, our team of Customer Advisors are here to help. We're open six days a week - you can view our opening hours here - and we're more than happy to answer your questions.